Separate files needing GPL license

+ Keep apache license for now, until this is completed:
  https://wiki.fd.io/view/TSC/Relicensing_Procedure
+ Add utilities for switching license comment blocks.
 - They do not preserve attributes, so executable flag is lost.
+ Move the affected files to GPL/.
 + Update paths so files are executed from the new location.
 + Change the way scripts are started to do not require executable flag.
 + Employ OptionString when constructing longer command lines.
+ Move also PacketVerifier.py and TrafficScriptArg.py
  as they are linked with traffic scripts.
 + That means the two files are outside "resources" package tree now.
 + Added __init__.py files so relative imports work in new package tree.
+ Start traffic scripts as python modules to allow relative imports.
 + Once again needed because they are outside the default PYTHONPATH.

Change-Id: Ieb135629e890adbaf5b79497570f3be25b746f9f
Signed-off-by: Vratko Polak <vrpolak@cisco.com>

1 files changed, 0 insertions, 231 deletions

diff --git a/resources/traffic_scripts/ipsec_policy.py b/resources/traffic_scripts/ipsec_policy.py
deleted file mode 100755
index 0dbf2af581..0000000000
--- a/resources/traffic_scripts/ipsec_policy.py
+++ /dev/null
@@ -1,231 +0,0 @@
-#!/usr/bin/env python3
-
-# Copyright (c) 2020 Cisco and/or its affiliates.
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at:
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Traffic script for IPsec verification."""
-
-import sys
-
-from ipaddress import ip_address
-from scapy.layers.inet import IP
-from scapy.layers.inet6 import IPv6, ICMPv6ND_NS
-from scapy.layers.ipsec import SecurityAssociation, ESP
-from scapy.layers.l2 import Ether
-from scapy.packet import Raw
-
-from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
-from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
-
-
-def check_ipsec(pkt_recv, ip_layer, dst_tun, src_ip, dst_ip, sa_in):
-    """Check received IPsec packet.
-
-    :param pkt_recv: Received packet to verify.
-    :param ip_layer: Scapy IP layer.
-    :param dst_tun: IPsec tunnel destination address.
-    :param src_ip: Source IP/IPv6 address of original IP/IPv6 packet.
-    :param dst_ip: Destination IP/IPv6 address of original IP/IPv6 packet.
-    :param sa_in: IPsec SA for packet decryption.
-    :type pkt_recv: scapy.Ether
-    :type ip_layer: scapy.layers.inet.IP or scapy.layers.inet6.IPv6
-    :type dst_tun: str
-    :type src_ip: str
-    :type dst_ip: str
-    :type sa_in: scapy.layers.ipsec.SecurityAssociation
-    :raises RuntimeError: If received packet is invalid.
-    """
-    if not pkt_recv.haslayer(ip_layer):
-        raise RuntimeError(
-            f"Not an {ip_layer.name} packet received: {pkt_recv!r}"
-        )
-
-    if pkt_recv[ip_layer].dst != dst_tun:
-        raise RuntimeError(
-            f"Received packet has invalid destination address: "
-            f"{pkt_recv[ip_layer].dst} should be: {dst_tun}"
-        )
-
-    if not pkt_recv.haslayer(ESP):
-        raise RuntimeError(f"Not an ESP packet received: {pkt_recv!r}")
-
-    ip_pkt = pkt_recv[ip_layer]
-    d_pkt = sa_in.decrypt(ip_pkt)
-
-    if d_pkt[ip_layer].dst != dst_ip:
-        raise RuntimeError(
-            f"Decrypted packet has invalid destination address: "
-            f"{d_pkt[ip_layer].dst} should be: {dst_ip}"
-        )
-
-    if d_pkt[ip_layer].src != src_ip:
-        raise RuntimeError(
-            f"Decrypted packet has invalid source address: "
-            f"{d_pkt[ip_layer].src} should be: {src_ip}"
-        )
-
-    if ip_layer == IP and d_pkt[ip_layer].proto != 61:
-        raise RuntimeError(
-            f"Decrypted packet has invalid IP protocol: "
-            f"{d_pkt[ip_layer].proto} should be: 61"
-        )
-
-
-def check_ip(pkt_recv, ip_layer, src_ip, dst_ip):
-    """Check received IP/IPv6 packet.
-
-    :param pkt_recv: Received packet to verify.
-    :param ip_layer: Scapy IP layer.
-    :param src_ip: Source IP/IPv6 address.
-    :param dst_ip: Destination IP/IPv6 address.
-    :type pkt_recv: scapy.Ether
-    :type ip_layer: scapy.layers.inet.IP or scapy.layers.inet6.IPv6
-    :type src_ip: str
-    :type dst_ip: str
-    :raises RuntimeError: If received packet is invalid.
-    """
-    if not pkt_recv.haslayer(ip_layer):
-        raise RuntimeError(
-            f"Not an {ip_layer.name} packet received: {pkt_recv!r}"
-        )
-
-    if pkt_recv[ip_layer].dst != dst_ip:
-        raise RuntimeError(
-            f"Received packet has invalid destination address: "
-            f"{pkt_recv[ip_layer.name].dst} should be: {dst_ip}"
-        )
-
-    if pkt_recv[ip_layer].src != src_ip:
-        raise RuntimeError(
-            f"Received packet has invalid destination address: "
-            f"{pkt_recv[ip_layer.name].dst} should be: {src_ip}"
-        )
-
-    if ip_layer == IP and pkt_recv[ip_layer].proto != 61:
-        raise RuntimeError(
-            f"Received packet has invalid IP protocol: "
-            f"{pkt_recv[ip_layer].proto} should be: 61"
-        )
-
-
-# TODO: Pylint says too-many-locals and too-many-statements. Refactor!
-def main():
-    """Send and receive IPsec packet."""
-
-    args = TrafficScriptArg(
-        [
-            u"tx_src_mac", u"tx_dst_mac", u"rx_src_mac", u"rx_dst_mac",
-            u"src_ip", u"dst_ip", u"crypto_alg", u"crypto_key", u"integ_alg",
-            u"integ_key", u"l_spi", u"r_spi"
-        ],
-        [u"src_tun", u"dst_tun"]
-    )
-
-    tx_txq = TxQueue(args.get_arg(u"tx_if"))
-    tx_rxq = RxQueue(args.get_arg(u"tx_if"))
-    rx_txq = TxQueue(args.get_arg(u"rx_if"))
-    rx_rxq = RxQueue(args.get_arg(u"rx_if"))
-
-    tx_src_mac = args.get_arg(u"tx_src_mac")
-    tx_dst_mac = args.get_arg(u"tx_dst_mac")
-    rx_src_mac = args.get_arg(u"rx_src_mac")
-    rx_dst_mac = args.get_arg(u"rx_dst_mac")
-    src_ip = args.get_arg(u"src_ip")
-    dst_ip = args.get_arg(u"dst_ip")
-    crypto_alg = args.get_arg(u"crypto_alg")
-    crypto_key = args.get_arg(u"crypto_key")
-    integ_alg = args.get_arg(u"integ_alg")
-    integ_key = args.get_arg(u"integ_key")
-    l_spi = int(args.get_arg(u"l_spi"))
-    r_spi = int(args.get_arg(u"r_spi"))
-    src_tun = args.get_arg(u"src_tun")
-    dst_tun = args.get_arg(u"dst_tun")
-
-    ip_layer = IP if ip_address(src_ip).version == 4 else IPv6
-
-    tunnel_out = ip_layer(src=src_tun, dst=dst_tun) if src_tun and dst_tun \
-        else None
-    tunnel_in = ip_layer(src=dst_tun, dst=src_tun) if src_tun and dst_tun \
-        else None
-
-    if not (src_tun and dst_tun):
-        src_tun = src_ip
-
-    sa_in = SecurityAssociation(
-        ESP, spi=r_spi, crypt_algo=crypto_alg,
-        crypt_key=crypto_key.encode(encoding=u"utf-8"), auth_algo=integ_alg,
-        auth_key=integ_key.encode(encoding=u"utf-8"), tunnel_header=tunnel_in
-    )
-
-    sa_out = SecurityAssociation(
-        ESP, spi=l_spi, crypt_algo=crypto_alg,
-        crypt_key=crypto_key.encode(encoding=u"utf-8"), auth_algo=integ_alg,
-        auth_key=integ_key.encode(encoding=u"utf-8"), tunnel_header=tunnel_out
-    )
-
-    ip_pkt = ip_layer(src=src_ip, dst=dst_ip, proto=61) if ip_layer == IP \
-        else ip_layer(src=src_ip, dst=dst_ip)
-    ip_pkt = ip_layer(ip_pkt)
-
-    e_pkt = sa_out.encrypt(ip_pkt)
-    tx_pkt_send = (Ether(src=tx_src_mac, dst=tx_dst_mac) /
-                   e_pkt)
-
-    sent_packets = list()
-    tx_pkt_send /= Raw()
-    sent_packets.append(tx_pkt_send)
-    tx_txq.send(tx_pkt_send)
-
-    while True:
-        rx_pkt_recv = rx_rxq.recv(2)
-
-        if rx_pkt_recv is None:
-            raise RuntimeError(f"{ip_layer.name} packet Rx timeout")
-
-        if rx_pkt_recv.haslayer(ICMPv6ND_NS):
-            # read another packet in the queue if the current one is ICMPv6ND_NS
-            continue
-        else:
-            # otherwise process the current packet
-            break
-
-    check_ip(rx_pkt_recv, ip_layer, src_ip, dst_ip)
-
-    rx_ip_pkt = ip_layer(src=dst_ip, dst=src_ip, proto=61) if ip_layer == IP \
-        else ip_layer(src=dst_ip, dst=src_ip)
-    rx_pkt_send = (Ether(src=rx_dst_mac, dst=rx_src_mac) /
-                   rx_ip_pkt)
-
-    rx_pkt_send /= Raw()
-    rx_txq.send(rx_pkt_send)
-
-    while True:
-        tx_pkt_recv = tx_rxq.recv(2, sent_packets)
-
-        if tx_pkt_recv is None:
-            raise RuntimeError(u"ESP packet Rx timeout")
-
-        if tx_pkt_recv.haslayer(ICMPv6ND_NS):
-            # read another packet in the queue if the current one is ICMPv6ND_NS
-            continue
-        else:
-            # otherwise process the current packet
-            break
-
-    check_ipsec(tx_pkt_recv, ip_layer, src_tun, dst_ip, src_ip, sa_in)
-
-    sys.exit(0)
-
-
-if __name__ == u"__main__":
-    main()